Box Three Hollow 2pc Race CranksThe Box Three Crankset utilises a hollow forged 2 piece design and features an oversized bottom bracket interface. For durability and ease of installation the 24mm spindle is pressed into the drive side crank arm, while the non drive side crank arm features a 2 bolt pinch system for added strength. The unique 4 bolt 104 BCD SPider features a flex resistant ring for rigidity and optimum performance. The Box Three Hollow Race Cranks come with an